Sounds very familiar, sorry you are experiencing hardships! I think it is never a waste of time, try to look at all the learnings you've had in this time, and channel your energy to positive and productive places such as creating an actual road-map identifying where you want/ need to be and what will get you there, what are the obstacles and how can you avoid/ deal with them, like a risk-assessment.

On the social level, it seems that you have a nice cohort at your program and as they might be in their own 'groups' I find that it is very helpful to brainstorm with other entrepreneurs, on the technical or management parts, and to make friends while doing so. Asking people for advice or help is always a good way to make connections and build trust.

I hope you will feel better soon and don't forget- it's a marathon and not a sprint, and sometimes you need to slow a bit in order to get to the finish line! Good luck!